Packing for use particularly with moving machine or engine parts



May s, 1928. 1,669,030

F. C. W. WILKINSON PACKING FOR USE PARTICULARLY WITH MOVING MACHINE OR ENGINE PARTS J Filed Nov. 11. 1927 v lliiiliii1iiilllillll 6 v "'Y Q I F Q? hate W1?? 4 ATTOP/VEY Patented May 8, 1928.

UNITED STATES PATENT OFFICE.

FRANCIS CLARENCE WALTER WILKINSON, OF TAPLOW, ENGLAND, ASSIGNOIt TO CRANE PACKING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

PACKING FOR USE IARTICULARLY WITH MOVING MACHINE OR ENGINE PARTS.

Application filed November 11, 1927, Serial No. 232,568, and in Great Britain April 21, 1926.

This invention relates to packing for use particularly with moving machine or engine parts such as the rotary shafts and recipro-' eating members of pumps, engines, compressors and the like.

Packing of this kind is known in which the metal laminae with or without interposed layers of fabric or the like are set at an incline or vertically with respect to their collective Wearing surface but a peculiarity and characteristic of the laminated metallic or semi-metallic packing of the present invention is that each lamina of the assembly forming the edge-on packing is an ap proximately rhomboidal sheet of packing material lying askew with respect to the collectivewearing surface and bent or folded to expose each of two parallel edges to wear, as forexample, by arranging the laminae in interfitting V or U form. These laminae may be composed of suitable metal or metals, treated fabric or other suitable material and may be associated or not with intervening layers 'of other material. 'The assembly of laminae may be used in its bare form as a packing or may be partly encased or walled in, except at the wearing surface, by any suitable material such as rubber composition or asbestos or solid metal or alloys, and

so in some cases it may be cored with fabric or metals or other suitable material.

One of the great advantages of edge-on packing is that it is free from liability to give off loose flakes or lamina fragments which are in themselves objectionable and which also leave the main body of the packing irregular at its working surface.

A convenient manner of obtaining packing as above described is to helically wind metal foil upon itself, with or without the use of a. suitable core, and afterwards divide the helically wound foil into two strips by cutting it through its axis longitudinally, the out faces of the strips being those which when in service come in contact with the moving shaft or rod or like machine part. The core if used may or may not be removed after the helioally wound foil has been cut.

If the core is used only for winding purso poses, then it is removed and the strip is deformed to close up the gap left by removal of the core. In order that the invention may be clearly understood and readily carried into effect,

5 we will now describe'the same more fully with reference to the accompanying drawings,in which F'gure 1 represents a strip of metal foil in course of being coiled around a core preparatory to being cut and shaped to produce packing in accordance with the present invention.

Figure 2 represents in cross section one half of the coiled foil after being severed longitudinally and removal of the half-core.

Figure 3 represents in cross section the foil of Figure 2 shaped into a rectangular packing in accordance with the invention.

Figures l, 5 and 6 are views similar to Figure 3 but illustrating modifications of the rectangular packing.

Figure 7 represents in cross section another form into which the foil of Figure 2 may be shaped to form packing in accordance with the present invention.

Figures 8 and 9 illustrate modifications of .the packing shown in Figure 7 Figures 10 and 11 illustrate practical applications of the two forms of packing illustrated in the earlier figures.

The forms of packing illustrated are formedfrom metal foil 1 coiled as in Figure 1 on a core 2 and slit longitudinally along its axis to produce the semi-cylindrical strip as in Figure 2,.which, after removal of the core, is shaped, as shown for example in Figures 3 or 7, to present only its edges 3 as a working surface.

The edge-on assembly of laminations as shown in Figure 3 may be encased with metal 4: on three sides as in Figure 4: or on its two sides as in Figure 5 or may be encased with other suitable material or composition such as 5 as represented in Figure 6'.

Similarly the edge-on assembly of laminat-ions shown in Figure 7 may be encased with metal as shown in Figure 8, or with composition as shown in Figure 9.

The various forms of packing are used in such a way as to present their edge-on faces ice as the working faces as shown in Figures 10 and 11 for example, where they are shown packed in a space between two machine parts 6 and 7.

Although we have described and illus- 10o trated certain specific embodiments of our edge-on packing, it is to be understood that the invention is not in any way limited to the constructions illustrated, as it is evident that many modifications may be resort- 1 ed to. For instance, the laminations need not be obtained by helical winding as in Figure 1 and slitting as in Figure 2 although this has the advantage of making two edges of each lamina readily available as components of the Working face. Moreover the semicylindrical strip of Figure 2 can be shaped otherwise than as a rectangle (Figure 3) or a triangle (Figure 7). Also the material composing the laminations need not be of metal but may be of any other suitable material or composition ormay consist partly of metal and partly of other material, such for example as treated fabric and the lamina whether all of the same material or of diiierent material may be associated with intervening layers of material not necessarily laminar in structure. The strips of nsoaoao packing may be supplied in straight form or ring form or may if desired be wqund into spiral form as is customary with some forms of packing.

What I claim is Packing for machine or engine parts and similar purposes comprising a body portion formed entirely of layers of packing material formed of laminae presenting an edgeon wearing surface, each lamina being of approximately rhomboidal form lying askew with respect to the collective wearing surface and bent or folded to present each of two parallel edges to wear.

In testimony whereof I have signed my name to this specification.

i o. W. WILKINSON. 

